Conquering The Boosting Around The World Achievement!

I am going through some of my games and trying my best to fill out the achievments in them.  Recently I've been working on Burnout Paradise City and the "Boosting Around The World Achievement".  Most videos on this achievement exploit a glitch which allows you to rack up 100x+ boost chains as long as you're willing to hold down the A button.  The only legit one I found was exactly 20x and I managed a 38x boost chain without any glitches and got a 15.5+ million stunt combo in the process.  I'm selfishly gloating, video's below, hope you like it. DISCLAIMER: I only spent about 3 hours on attempts before I figured out that doing a stunt run would drastically reduce the amount of cars on the road at the time of the boost run.  I plan on reattemting this same rout without the stunt run helper and also am hoping to do a full lap around the rim of Paradise City.  Until then, I've got homework :'(.